Condensed Consolidated Statements of Equity - USD ($) $ in Millions	Total	Total AIG Share- holders' Equity	Preferred Stock and Additional Paid-in Capital	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non- redeemable Non- controlling Interests
Balance, beginning of period at Dec. 31, 2023	$ 51,301	$ 45,351	$ 485	$ 4,766	$ (59,189)	$ 75,810	$ 37,516	$ (14,037)	$ 5,950
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	(17)	(17)			293	(310)
Redemption of preferred stock	(485)	(485)	(485)
Purchase of common stock	(3,359)	(3,359)			(3,359)
Net income (loss) attributable to AIG or noncontrolling interests	(2,284)	(2,761)					(2,761)		477
Dividends on preferred stock and preferred stock redemption premiums	(22)	(22)					(22)
Dividends on common stock	(504)	(504)					(504)
Other comprehensive income	5,637	5,935						5,935	(298)
Net increase (decrease) due to divestitures and acquisitions	(5,885)	119				(418)		537	(6,004)
Contributions from noncontrolling interests	28								28
Distributions to noncontrolling interests	(72)								(72)
Other	137	188				192	(4)		(51)
Balance, end of period at Jun. 30, 2024	44,475	44,445		4,766	(62,255)	75,274	34,225	(7,565)	30
Balance, beginning of period at Mar. 31, 2024	49,110	43,385		4,766	(60,603)	75,625	38,466	(14,869)	5,725
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	10	10			25	(15)
Purchase of common stock	(1,677)	(1,677)			(1,677)
Net income (loss) attributable to AIG or noncontrolling interests	(3,884)	(3,977)					(3,977)		93
Dividends on common stock	(261)	(261)					(261)
Other comprehensive income	6,694	6,694						6,694
Net increase (decrease) due to divestitures and acquisitions	(5,600)	202				(408)		610	(5,802)
Contributions from noncontrolling interests	17								17
Distributions to noncontrolling interests	(2)								(2)
Other	68	69				72	(3)		(1)
Balance, end of period at Jun. 30, 2024	44,475	44,445		4,766	(62,255)	75,274	34,225	(7,565)	30
Balance, beginning of period at Dec. 31, 2024	42,550	42,521	0	4,766	(65,573)	75,348	35,079	(7,099)	29
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	26	26			199	(173)
Purchase of common stock	(4,056)	(4,056)			(4,056)
Net income (loss) attributable to AIG or noncontrolling interests	1,842	1,842					1,842
Dividends on common stock	(488)	(488)					(488)
Other comprehensive income	1,552	1,551						1,551	1
Distributions to noncontrolling interests	(5)								(5)
Other	108	105				114	(9)		3
Balance, end of period at Jun. 30, 2025	41,529	41,501	0	4,766	(69,430)	75,289	36,424	(5,548)	28
Balance, beginning of period at Mar. 31, 2025	41,459	41,431		4,766	(67,662)	75,251	35,540	(6,464)	28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued under stock plans	33	33			38	(5)
Purchase of common stock	(1,805)	(1,805)			(1,805)
Net income (loss) attributable to AIG or noncontrolling interests	1,144	1,144					1,144
Dividends on common stock	(254)	(254)					(254)
Other comprehensive income	916	916						916
Distributions to noncontrolling interests	(4)								(4)
Other	40	36			(1)	43	(6)		4
Balance, end of period at Jun. 30, 2025	$ 41,529	$ 41,501	$ 0	$ 4,766	$ (69,430)	$ 75,289	$ 36,424	$ (5,548)	$ 28